The company, which specialises in creating unusual flavours and presentations of ice cream, has sworn to keep a lid on its latest invention.

In a tight-lipped interview with the Bristol Post, company founder Charlie Harry said: “All we can say is a person approached us asking if we could make this flavour.

“We suggested we would go public to raise our own profile but the client was very reluctant. They just about agreed in the end for us to keep them anonymous.”

Charlie said he had to sign strict confidentiality agreements with the customers before being invited to the top secret party with his custom-made portable ice cream parlour.

He said: “It’s top secret. There is an agreement which cannot be broken.

“I can reveal everyone at the party liked it, there was a great reaction. It’s all very secretive. All I’m allowed to say is it was for a party and that they were very happy with the end result.

“They were all very nice but we can’t legally say who they were.”

Asked if he was tempted to try the new flavour, he said: “No, I was a bit terrified to be honest. I have never taken something like that but I am aware of its effects.”

He agreed it was not ideal for a professional work environment.

He added he was also unable to try the ice cream as it contained a prescription-only drug.

Charlie’s experimental ice cream company has made thousands of flavours of ice cream including beer, fish and chips, roast beef and gold leaf.

Last year they made the world’s first glow in the dark ice cream using Jellyfish luminescence. They are currently working on creating the world’s first flammable ice cream and the world’s first invisible ice cream.

Erm he couldn't taste it because it contained a prescripton drug.... erm how come he could SUPPLY it then? Any person trying it would need to have been assessed by a pharmacist or it would be illegal....